What is dynamic acquisition?
Dynamic acquisition is where the MSS data is acquired from a moving object, i.e, a vessel. The Blueview data is typically obtained whilst the vessel sails parallel to the target, with 2-4 passes being optimal to achieve a high-resolution dataset. Using this technique, hit counts at a 5-10m range are typically between 2000-4000 per square metre.
Positioning is governed by an Inertial Navigation System (INS), which combines GNSS and Motion data to assign a real-world co-ordinate to each sounding at the time of acquisition. Positioning can later be improved in post processing if necessary.
Dynamic acquisition is only made possible by the type of MSS system owned by SEP Hydrographic; the vast majority of MSS systems only lend themselves to static acquisition techniques. Whilst conventional Multibeam systems have been used in this fashion for many years, are generally intended for resolving small targets at greater depths. Their lower frequency may inhibit damage detection at closer ranges.